Set up husky and lint-staged.

package.json

@@ -27,6 +27,8 @@
   "devDependencies": {
     "@angular/compiler": "^8.2.9",
     "@angular/core": "^8.2.9",
+    "husky": "^3.0.8",
+    "lint-staged": "^10.0.0-0",
     "prettier": "^1.15.0",
     "rxjs": "^6",
     "tslint": "^5.9.1",
@@ -35,6 +37,16 @@
   },
   "scripts": {
     "test": "tslint -p tsconfig.json --print-config tsconfig.json >/dev/null",
-    "lint": "prettier --check '*.js' '*.json'"
+    "lint": "prettier --check *.js *.json",
+    "lint:fix": "prettier --write *.js *.json"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
+  },
+  "lint-staged": {
+    "*.js": "npm run lint:fix",
+    "*.json": "npm run lint:fix"
   }
 }

tslint.json

@@ -5,11 +5,7 @@
     "rxjs-tslint-rules",
     "tslint-config-prettier"
   ],
-  "rulesDirectory": [
-    "codelyzer",
-    "tslint-defocus",
-    "tslint-plugin-prettier"
-  ],
+  "rulesDirectory": ["codelyzer", "tslint-defocus", "tslint-plugin-prettier"],
   "rules": {
     "arrow-return-shorthand": true,
     "array-type": [true, "array-simple"],